The emergency service facilities location is one of the most important issues in the emergency management.
This study focused on the location set covering problem (LSCP) for emergency service facilities under fuzzy
environment. On the basis of defining the signed distance of trapezoidal fuzzy number, the ranking rules of trapezoidal
fuzzy number are defined, the model of emergency service facilities location with fuzzy restraints is proposed, and the
solution algorithm for the emergency service location based on the ordering rules of trapezoidal fuzzy number is given.
Finally, a numerical simulation is used to illustrate the application of the method, which shows that the algorithm is
feasible and advantageous.